Ningbo Institute of Materials, Chinese Academy of Sciences, high-performance carbon fiber and its composites team (formerly known as Ningbo Institute of Materials, Chinese Academy of Sciences, Specialty Fiber Division, hereinafter referred to as "Ningbo Institute of Materials, Carbon Fiber Team") was established in 2008, focusing on high-performance carbon fiber localization of technological research and development, after more than 10 years of development, the team relying on the National Engineering Laboratory of the Development and Reform Commission, the carbon fiber testing and characterization platform of the Development and Reform Commission, the Zhejiang Provincial Engineering Laboratory and other platforms to form a technical system with fully independent intellectual property rights of three major fields After more than ten years of development, the team has formed three major technical systems with completely independent intellectual property rights, relying on the National Engineering Laboratory of Development and Reform Commission (NDRC), Carbon Fiber Testing and Characterization Platform of NDRC, and Engineering Laboratory of Zhejiang Province:
High-performance carbon fiber preparation technology: the team has the National Engineering Laboratory of Carbon Fiber Preparation Technology of NDRC, the Zhejiang Provincial Engineering Laboratory of High Performance Carbon Fiber Industrialization Technology (Research Center) and other platforms, and has made breakthroughs in key preparation technologies of domestically produced T800-grade and T1000-grade high-strength and medium-modulus carbon fibers, and key preparation technologies of domestically produced M40J, M50J, M55J, M60J, and M65J high-strength and high-modulus carbon fibers. Key preparation technology of M40J, M50J, M55J, M60J, M65J grade high-strength and high-mode carbon fiber, as well as the key technology of new generation of high-strength, high-mode and high-extension carbon fibers of M30X, M40X, M50X, M55X type.
High-performance fiber testing and characterization technology: the team owns the carbon fiber testing and characterization platform of the National Development and Reform Commission, and the "High-performance Fiber Preparation and Characterization Testing (Ningbo) Platform" of the China Chemical Fiber Industry Association, etc. The team has established and improved a professional testing system for high-performance carbon fiber testing, and developed the following technologies: Silicon Carbide Fibers, Aramid Fibers, Polyimide Fibers, Glass Fibers, Basalt Fibers, and Polycarbonate Fibers. We have developed a variety of fiber testing methods covering silicon carbide fibers, aramid fibers, polyimide fibers, glass fibers, basalt fibers and other fiber testing methods, providing testing and characterization services for dozens of domestic enterprises, institutions and scientific research colleges and universities.
Fiber prepreg process and processing technology: the team has a professional high-performance fiber prepreg process and production platform, which can carry out various types of carbon fiber prepreg process evaluation and production services, based on the demand for high-end ultra-thin prepregs in different fields, in January 2024, the platform has successfully developed two models of CNI QM40 (M40J grade) and CNI QM55 (M55J grade) high-modulus carbon fibers. Ultra-thin prepregs, forming batch production capacity, in addition to providing services such as structural design, analysis and processing of various composite materials.
In addition to the above technologies, the carbon fiber team of NIMR has also developed a series of technical products such as low-cost acrylic-based carbon fibers, metalized carbon fibers, high-temperature-resistant thermoplastic sizing agents, and raw silk oiling agents in order to meet the needs of customers. This issue introduces the metal-plated carbon fiber technology.
1Technology background
Due to its excellent properties such as high strength, high modulus and corrosion resistance, PAN-based carbon fiber is widely used in resin matrix composites, ceramic matrix composites and metal matrix composites. By using carbon fiber to reinforce the metal matrix, it can improve the mechanical properties of the composite material, but also maintain the advantage of light weight, so that it has a wide range of prospects for application in the aerospace and automotive industries.
At present, there is a general problem of poor wettability between carbon fiber and metal matrix, for example, in carbon fiber reinforced aluminum matrix composites, aluminum melt is difficult to fully infiltrate the carbon fiber tow, so that it is poorly bonded to the interface with the matrix, and the carbon fibers can not play a reinforcing effect, which restricts the expansion of the field of carbon fiber reinforced metal matrix composites.
Electroplating method can deposit metal layer on the surface of carbon fiber at high speed, compared with T300/T700 standard modulus carbon fiber, T800/T1000 medium modulus carbon fiber, high modulus carbon fiber with carbon content of more than 99%, the conductivity is obviously better, and it is more conducive to the metal deposition in electroplating.
2Technical features
Ningbo Institute of Materials and Carbon Fiber team has a complete set of continuous surface electrodeposition equipment, with independent research and development of high modulus carbon fiber as raw material, developed a carbon fiber surface online metal plating technology.
After electrochemical plating treatment can be uniformly introduced on the surface of the fiber nickel, copper, aluminum and other different types of metal plating, plating thickness can be controlled; at the same time, the mechanical properties of the treated carbon fiber almost no loss, and conductivity is greatly improved. The resistance of metalized carbon fibers has been tested to be as low as 2 ohms per meter; this technology is applicable to the metallization of 1-24K tow carbon fibers.
Potential applications: Metallized carbon fiber can meet the needs of aerospace fields such as antennas, sensors, electromagnetic shielding, energy fields such as high-speed motor rotors, electric heating materials, and medical wires.
3 Core patents and cooperation methods
1),Invention Patent CN114775274A A method and device for continuous surface metallization of carbon fiber (Authorized)
Patent inventors: Qian Xin, Ma Hongbo, Jin Lu, Zhang Yonggang, Wang Xuefei, Zhong Junjun, Zhi Jianhai
The present invention relates to the technical field of carbon fiber surface treatment, and discloses a method and device for continuous surface metallization of carbon fiber, which can realize the continuous preparation of carbon fiber surface metallization, with simple equipment and short treatment cycle.
2),Patent of invention CN112861337B A method of predicting the surface temperature of carbon fiber after heating by a carbon fiber hairline (Authorized)
Patent inventor: Su Hongming, Zhang Yonggang, Yu Shuixin, Wo Junkang, article apple
The present invention discloses a method for predicting the surface temperature of a carbon fiber hairline after heating, using a mathematical model method to predict the surface temperature of the carbon fiber hairline after heating, and using this method to reduce the carbon fiber hairline joints and enhance the length of the carbon fiber hairline to achieve the effects of simple construction, improved safety and aesthetics, and reduced cost and weight.